package dh01.ex01;

import java.io.FileReader;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
import java.util.Scanner;

public class TextFileTest {
	
	public static void main(String[] args) {
		Employee[] staff = new Employee[3];
		      staff[0] = new Employee("Carl Cracker", 75000, 1987, 12, 15);
		      staff[1] = new Employee("Harry Hacker", 50000, 1989, 10, 1);
		      staff[2] = new Employee("Tony Tester", 40000, 1990, 3, 15);
       try
     {
		         // save all employee records to the file employee.dat
		          PrintWriter out = new PrintWriter("employee.dat");
		          writeData(staff, out);
		          out.close();
		 
		          // retrieve all records into a new array
		          Scanner in = new Scanner(new FileReader("employee.dat"));
		           Employee[] newStaff = readData(in);
		          in.close();
		
		        // print the newly read employee records
		          for (Employee e : newStaff)
		              System.out.println(e);
		       }
		        catch (IOException exception)
		        {
		           exception.printStackTrace();
		       }

	}
	
	private static void writeData(Employee[] employees, PrintWriter out) {
		out.println(employees.length);
		
		for (Employee e : employees) {
			e.writeData(out);
		}
	}
	
	private static Employee[] readData(Scanner in) {
		int n = in.nextInt();
		in.nextLine();
		
		Employee[] employees = new Employee[3];
		/*
		for (Employee e : employees) {
			e = new Employee();
			e.readData(in);
		}
		*/
		for (int i = 0; i < employees.length; i++) {
			employees[i] = new Employee();
			employees[i].readData(in);
		}
		return employees;
	}
}

class Employee {
	public Employee() {
		
	}
	
	public Employee(String n, double s, int year, int month, int day) {
		name = n;
		salary = s;
		GregorianCalendar calendar = new GregorianCalendar(year, month - 1, day);
		hireDay = calendar.getTime();
	}
	
	public String getName() {
		return name;
	}

	public double getSalary() {
		return salary;
	}

	public Date getHireDay() {
		return hireDay;
	}
	
	public void raiseSalary(double byPercent) {
		double raise = salary / 100 * byPercent;
		salary += raise;
	}

	@Override
	public String toString() {
		return getClass().getName() + "[name=" + name +", salary=" + salary + ", hireDay=" + hireDay + "]";
	}
	
	public void writeData(PrintWriter out) {
		GregorianCalendar calendar = new GregorianCalendar();
		calendar.setTime(hireDay);
		out.println(name + "|" + salary + "|" + calendar.get(Calendar.YEAR) + "|" + (calendar.get(Calendar.MONTH) + 1)
			 + "|" + calendar.get(Calendar.DAY_OF_MONTH));
	}
	
	public void readData(Scanner in) {
		// 注意nextLine()这个方法
		String line = in.nextLine();
		String[] tokens = line.split("\\|");
		name = tokens[0];
		salary = Double.parseDouble(tokens[1]);
		int y = Integer.parseInt(tokens[2]);
		int m = Integer.parseInt(tokens[3]);
		int d = Integer.parseInt(tokens[4]);
		GregorianCalendar calendar = new GregorianCalendar(y, m - 1, d);
		hireDay = calendar.getTime();
	}
	
	private String name;
	private double salary;
	private Date hireDay;
}
